 Tar rot fungus (Rhytisma acerinum) on fallen maple leaves in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Tar rot fungus (Rhytisma acerinum) on last year maple leaves in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Tar rot fungus on fallen maple leaves, Rhytisma acerinum mushroom, in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Tar rot on maple leaves (Rhytisma acerinum) in Sosnovka Park. Saint Petersburg, Russia, October 8, 2016
 Sycamore tarspot fungus (Rhytisma acerinum) on fallen maple leaves in a forest along the gulf in area of Lisiy Nos - Morskaya, west from Saint Petersburg. Russia, September 26, 2017
 Sycamore tarspot fungus (Rhytisma acerinum) in a forest along the gulf in area of Lisiy Nos - Morskaya, west from Saint Petersburg. Russia, September 26, 2017
 Leaf parachute mushrooms (Marasmius epiphyllus) on a maple leaf taken from Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Silver leaf fungus (Chondrostereum purpureum mushrooms) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Maple leaf in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Ring-like growth of thin white arachnoid corticioid fungus (mushroom) Athelia arachnoidea(?) killing lichens on a trunk of a maple in Sosnovka Park. Saint Petersburg, Russia, February 3, 2017
 Maple alley in Sosnovka Park. Saint Petersburg, Russia, October 8, 2017
 Maple trees in Sosnovka Park. Saint Petersburg, Russia, October 3, 2017
 Birch and maple trees in Sosnovka Park. Saint Petersburg, Russia, October 3, 2017
 Maple trees near a memorial in Sosnovka Park. Saint Petersburg, Russia, October 8, 2017
 Snowy waxcap mushrooms (Cuphophyllus virgineus) under maple trees in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
 Maple leaf damaged by fungus in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, September 21, 2015
 Corticioid fungus on birch tree in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Golden jelly fungus (Tremella mesenterica)(?) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Young mossy maple polypore mushrooms (Oxyporus populinus)(?) in a hollow of small willow stump in Sosnovka Park. Saint Petersburg, Russia, April 4, 2017
 White rot fungus Phlebiopsis gigantea(?) on pine tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Witches butter jelly fungus Exidia nigricans in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017
 Fomitiporia punctata corticioid fungus (Phellinus punctatus mushroom) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Tinder conk mushroom (polypore fungus Fomes fomentarius) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Tinder conk mushroom (polypore fungus Fomes fomentarius) on a birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Texture of Fomitiporia punctata corticioid fungus (Phellinus punctatus mushroom) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Texture of crust fungus Fomitiporia punctata (Phellinus punctatus mushroom) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Fomitiporia punctata corticioid fungus (Phellinus punctatus mushroom) on willow in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Ochre cushion fungus (Trichoderma pulvinatum) on a birch polypore mushroom in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Old jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Big jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Young leaf of mountain ash (Sorbus aucuparia, Russian name Ryabina) in Sosnovka Park. Saint Petersburg, Russia, May 20, 2017
 Back lit leaf of mountain ash (Sorbus aucuparia, Russian name Ryabina) in Sosnovka Park. Saint Petersburg, Russia, May 20, 2017
 Underside of a leaf with coltsfoot rust gall fungus, Puccinia poarum, in Sosnovka Park. Saint Petersburg, Russia, May 27, 2019
 Birch polypore mushroom with a mold like ochre cushion fungus (Trichoderma pulvinatum) in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) with snow on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Caps of jelly rot fungus (Phlebia tremellosa, Merulius tremellosus) on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Corticioid mushroom Trechispora mollusca on the lower surface of true conk fungus in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Brown witch s butter mushroom (jelly fungus, Exidia saccharina) on a pine in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017
 Red velvety patches on a birch leaf (velvet erineum galls) in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017
 Red velvety patches on a birch leaf caused by the eriophyid mite in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017
 Close up of a young leaf of mountain ash (Sorbus aucuparia, Russian name Ryabina) in Sosnovka Park. Saint Petersburg, Russia, May 20, 2017
 Prostrate form of purple toothed polypore fungus (Trichaptum biforme) on a fallen birch in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Prostrate form of purple toothed polypore fungus (Trichaptum biforme) covering a birch log in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Fomitiporia punctata corticioid fungus (Phellinus punctatus mushroom) with insect eggs on willow in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves taken from peat area in Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Drying brown witch s butter mushroom (jelly fungus, Exidia saccharina) on a pine in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017
 Leaf parachute mushrooms (Marasmius epiphyllus) on a rotten leaf of birch taken from Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Fungus (mushroom) Cylindrobasidium evolvens growing on fallen birch leaves on peat in swampy area of Sosnovka Park. Saint Petersburg, Russia, March 23, 2017
 Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) in Sosnovka Park. Saint Petersburg, Russia, March 20, 2017
 Toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Mossy maple polypore mushrooms (Oxyporus populinus) on a tree in Lesnoy Park. Saint Petersburg, Russia, March 9, 2017
 Cluster of mossy maple polypore mushrooms (Oxyporus populinus) in Lesnoy Park Saint Petersburg, Russia, March 9, 2017
 Greenish mossy maple polypore mushrooms (Oxyporus populinus) in Lesnoy Park Saint Petersburg, Russia, March 9, 2017
 Red velvety patches on a birch leaf caused by the velvet erineum gall eriophyid mite in Sosnovka Park. Saint Petersburg, Russia, June 29, 2017
 Velvety patches on a birch leaf caused by the velvet erineum gall eriophyid mite in Sosnovka Park. Saint Petersburg, Russia, August 21, 2017
 Dried toothed crust fungus (Xylodon radula, Basidioradulum radula)(?) on a tree in Sosnovka Park. Saint Petersburg, Russia, March 15, 2017
 Sidera lenis (Skeletocutis lenis)(?) poroid fungus on a broken pine tree in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Maple leaves in Sosnovka Park. Saint Petersburg, Russia, October 8, 2016
 Mossy maple polypore mushrooms (Oxyporus populinus) in a depression on a tree in Lesnoy Park. Saint Petersburg, Russia, March 9, 2017
 Large cluster of mossy maple polypore mushrooms (Oxyporus populinus) in Lesnoy Park Saint Petersburg, Russia, March 9, 2017
 Decaying basidiome of jelly rot (Phlebia tremellosa, Merulius tremellosus) with a saprobic fungus Botryobasidium subcoronatum on a birch tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Young leaf and a cluster of maple flowers (Acer platanoides) in a park of Politekhnichesky Institute. Saint Petersburg, Russia, May 20, 2011
 Porodaedalea pini (Phellinus pini) bracket fungus (polypore mushrooms) on a pine tree in Sosnovka Park. Saint Petersburg, Russia, March 13, 2017
 Spreading poroid fungus Sidera lenis (Skeletocutis lenis)(?) on a broken pine tree in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Sidera lenis (Skeletocutis lenis)(?) poroid fungus on rotten wood of a pine tree in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Yellow maple leaves in Sosnovka Park. Saint Petersburg, Russia, October 20, 2016
 Frozen maple leaves in Sosnovka Park. Saint Petersburg, Russia, October 31, 2016
 Some orange fungus together with tiny dark cups of Ascomycete fungus on a stump in Sosnovka Park. Saint Petersburg, Russia, September 23, 2017
 White pores of poroid fungus Sidera lenis (Skeletocutis lenis)(?) on a broken pine tree in Sosnovka Park. Saint Petersburg, Russia, March 27, 2017
 Birch alley with maple leaves in Sosnovka Park. Saint Petersburg, Russia, October 20, 2016
 Silver leaf fungus (Chondrostereum purpureum mushrooms) on a bush in Udelny Park. Saint Petersburg, Russia, February 28, 2017
 Crust of silver leaf fungus (Chondrostereum purpureum mushrooms) in Udelny Park. Saint Petersburg, Russia, February 28, 2017
 Rusty yellow maple leaf in Old Sylvia in Pavlovsk Park. Pavlovsk, suburb of Saint Petersburg, Russia, September 18, 2015
 Bay cup fungus (Peziza badia(?)) in Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
 Some brown corticioid fungus on a log in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Some brown crust fungus on a log in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Bay cup fungus (Peziza badia) in Sosnovka Park. Saint Petersburg, Russia, July 6, 2017
 Young leaf of maple in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 14, 2011
 Jellydisc fungus Ascocoryne cylichnium(?) in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
 Jellydisc fungus Ascocoryne cylichnium(?) in Sosnovka Park. Saint Petersburg, Russia, September 23, 2017
 Recurved cup fungus (Peziza repanda)(?) in Sosnovka Park. Saint Petersburg, Russia, July 16, 2017
 Brown and white crust fungus in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Charcoal cup fungus (Peziza echinospora)(?) in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
 Toothed Cup fungus (Tarzetta cupularis) in Sosnovka Park. Saint Petersburg, Russia, June 22, 2017
 Jelly fungus Calocera cornea on a log in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
 Fringe of a brown corticioid fungus on a log in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Tiny orange dot fungus on a barkless log in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
 Some white and brown corticioid fungus on a log in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 White corticioid fungus (mushroom) Athelia arachnoidea on a maple tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, April 2, 2017
 Young northern tooth fungus (Climacodon septentrionalis) on a maple tree in Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, July 28, 2017
 Some crustous fungus at the base of a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
 Some crustous fibrillous fungus on a birch tree in Sosnovka Park. Saint Petersburg, Russia, September 13, 2017
 White poroid fungus on rotten wood in Sosnovka Park. Saint Petersburg, Russia, September 2, 2017
 Common eyelash cup fungus (Scutellinia scutellata) in Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
 Cup fungus Peziza echinospora(?) on a fire site in Sosnovka Park. Saint Petersburg, Russia, June 22, 2017
 Fungus Pulvinula convexella on old campfire site in Sosnovka Park. Saint Petersburg, Russia, June 30, 2017
 Jelly fungus Calocera cornea on a barkless log in Sosnovka Park. Saint Petersburg, Russia, July 19, 2017
 Jellydisc fungus Ascocoryne cylichnium(?) on wood in Sosnovka Park. Saint Petersburg, Russia, September 16, 2017
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